Concomitant yield optimization of tannase and gallic acid by Bacillus licheniformis KBR6 through submerged fermentation: An industrial approach

The present study is concerned with the evaluation of tannase and gallic acid production efficacy Bacillus licheniformis KBR6 under different environmental conditions through submerged fermentation. Results have shown that mineral sources differential influences on production. Highest yield was observed at incubation period 18 h 22 h, respectively. At tannic concentration 15 g/l, maximum cell mass (0.75 g/l), coefficient (0.08 g/g), specific growth rate (37.5 mg/g/h), (16.3 U/g) (0.80 U/g/h) were observed, however, higher a decrease in but increased increasing concentration. Additional carbohydrate like glucose, fructose, lactose showed positive influence enzyme yield. Among studied nitrogen urea NH4Cl, phosphate KH2PO4 favourable effects simultaneous Temperature 35 °C found to be optimum for Of all metal ions Ca2+, Mg2+ Na+ effect whereas, Co2+, Ag2+, Pb2+, Hg2+ inhibitory effects.